Explain the meaning of following quote: Whoever you are, or whatever it is that you do, when you really want something, itsbecause that desire...

This
quote largely revolves around the concept of dreams and the necessity to at least attempt to
achieve them. In The Alchemist, Melchizedek tells this to Santiago in
regard to his own dreams of visiting the pyramids. Before this point, Santiago had been filled
with doubt that his dreams were no more than simply that, dreams. He thought that attempting to
see them through was silly or selfish. However, Melchizedek informs him that dreams are simply
the medium by which people receive hints regarding their place in the world. He says that it is
not only a good thing for Santiago to follow his dream, but that it is, in fact, of the utmost
importance. In Melchizedek's opinion, dreams are callings that will help Santiago find where he
needs to be.

It is this quote that introduces the "soul of the
universe," which largely concerns the oneness of all living things. It deals largely with
the concept of fate, and the idea that Santiago's destiny is not entirely his own, but a
responsibility that only he can fulfill. By following his dreams, Santiago will eventually find
the place that he absolutely needs to be in the world, contributing to the oneness and
perfection of existence.